Windmill



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E. B. GOO'K Windmill (No Model.)

Patented Aug.l 3, 188Q.

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( No Model.) a 2 Sheets-Sheet 2;

E. B. COOK. y Windmill. l No. 230,614. Patented Aug'. 3,1880( f l Omluw ,a E-Mfulol o: l? c c ft; an c .zc

1 F lr'r r? lo ol Inugmgz N. FEI'ERS, FHOTO-LITMQGRAPNER. WASHINGTDN. D C.

l NTTE STATES PATENT OFFICE.

EMORY B. COOK, OF NORTH BELLINGHAM, MASSACHUSETTS.

WINDIVIILL.

SPECIFICATION forming part of Letters Patent No. 230,614, dated August 3, 1880.

I Application {ihd May 17, i880. (No model.)

To all whom it may concern:

Be it known that I, EMORY BANGS COOK, of North Bellingham, in the county of Norfolk and State of Massachusetts, have invented a new and useful Improvement in WVindmills or Wind-Wheels; and I do hereby declare the saine to be described iii the following specilic'ation, and represented in the accompanying drawings, of which- Figure lis a side view, Fig. 2 a horizontal section, and Fig. 3 a vertical section, of a windmill provided with my invention, the nature of which is fully defined in the claim or claims hereinafter presented. Fig.5 is aview of the cross-head and sectors, to be hereinafter described.

The object of my invention is to adjust the vaiies of the wheel. as the force of the wind may increase or diminish, in order that the pressure of wind operating on the said vaiies to revolve the wheel may be equalized from time to time.

ln the drawings, A denotes the wiiid-wlieel surrounded by a stationary circular shroiidin g or blind, B, havin its vertical shits arranged at equal distances apart and in directions to canse the wind, iii passing between them in order to revolve the wheel, to iinpinge upon its vanes to the best advantage. The. wheel, arranged within its stationary annular blind or shrouding eoncentrically, is supported by a vertical shaft, a, and is composed iu part of two heads or spoked wheels, b b, arranged concentrically and ata suitable distance apart upon such shaft. The vanes c of the wheel extend between the rims of the two heads, and at or near their niiddles the said vanes are pivoted to or are applied to turn on rods d, exteiidiii g from one to the other of the spoked heads.

A gear-wheel, C, turns freely on the windwlieel shaft, and is connected with the several vanes by a series of arms or rods, e, projecting from it to them, and pivoted both to itand them, the same being so that on turning the gear on the shaft the vanes shall simultaneously be turned on their sustaining-rods. Underneath the said gear there is pivoted to the shaft, or to a cross-head, f', afxed thereon, two arms, D, each having a ball or weight, F, fixed to it at its lower end. Each of the said arin arms has extending upward from it, above its pivot, a toothed sector', G, to engage with the gear above mentioned, the shaft being midway between the said toothed sectors.

From the above it will be seen' that during the revolution of the wind-wheel the weighted arms and toothed sectors will revolve with it, and should the velocity of such Wheel increase the increased centrifugal force generated in the weighted arms will move them outward, and thereby, by means of the sectors, turn the gear more or less in a manner to cause the vanes of the wheel to approach one another, or vary their angular' positions. On the force of the Wind diminishing, so as to operate with less effect on the wheel, the vanes thereof will be moved more or less apart, to cause the wind to operate with greater power on the wheel. Thus, as the velocity of the wind or the duty to be performed by the wheel may vary, the rotary motion of the Wheel will be kept at or about one uniform rate or speed.

J ointed to a sleeve, H, adapted to the wheelshaft to encompass it and to slide vertically on it, are two arms, la, which extend upward and are jointed to the weighted arms D. The sleeve is grooved transversely to receive the prongs of a forked lever, I, fulcrumed to a stationary post, K, the said lever having a Wire or rod, L, extending down from its free On pulling the arm downward the vanes of the wheel may be closed upon each other, so as toprevent the wheel from being revolved by the wind.

In obtaining the proper Obliquity of each of the slats of the annular shrouding I have found that when the angle made by the radius of the wheel andthe direction of the Obliquity of a slat` has its vertex in the pivotal axis of the slat, and the slat stands at equal angles to the lines of the said angle, such angle should be one hundred and eight degrees of a circle, or substantially so.

Fig. 4 is a diagram representing the mode of arranging the slats of the shrouding. In such gure A denotes a vane of the wheel, and B one of the slats of the blind or shrouding. The angle a b c, made by the lines a b, bc, is one hundred and eight degrees, each angle d b a and c b c being equal and making thirty- 'IOO six degrees. Each of the other vaues of the Wheel is arranged in a direction of a tangent to the dotted circlef, to which the line a b is tangential, such circlef being concentric with the wheel and its shrouding.

From the above it will be seen that each of the slats is arranged to stand in a plane tangential to a circle concentric with the Wheel and having a radius corresponding in length to that of the longer side of a right-angled triangle whose hypotenuse equals the radius of the Wheel, or properly the distance between the axis of the wheel and that of one of its vanes.

What I claim as my invention is as follows, Viz:

l. The combination of Weighted armsD D, as shown, applied fo the wind-Wheel shaft a, and provided with toothed sectors Gr G, as described, with the toothed gear C, adapted to turn on such shaft and connected to the revoluble vaues of the Wheel by rods e, pivoted to them and the said for the purpose and as set forth.

2. The Wind-w 1i t annular blind constructz 5 ed substantially 1 describedthat is, with its slats disposed in planes tangential to a circle concentric with the Wheel and having a radius corresponding to the longer side of a right-angled triangle Whosehypotenuse equals 3o the distance between the axis of the Wheel and that of one of its vanes. t

3. The combination of the sleeve H, the furcated lever I, and the arms 7a 7c Wit-h the weighted arms D D and their toothed sectors 3 5 G G, and wheel C, applied to the shaft and to the vanes of the Wind-wheel A, substantially EMORY BANGS COOK.

fiar, all being as and operate substantially as set forth.

Witnesses: p

WILLIAM A. MGKEAN, ADDISON E. BULLARD. 

